code: def _init_layers(self):
      self.init_proposal_bboxes = nn.Embedding(self.num_proposals, 4)
      self.init_proposal_features = nn.Embedding(
          self.num_proposals, self.proposal_embedding_dim
      )
  
file_path: PaddleDetection/ppdet/modeling/proposal_generator/embedding_rpn_head.py
imports: import paddle
  from paddle import nn
  from ppdet.core.workspace import register
label_desc: Use image node_id 2 for calling the EmbeddingRPNHead obj's underlying member method code with example usage: obj._init_layers() without return types